Allow make from the exec directory.

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@1532 fd59a12c-fef9-0310-b244-a6a79926bd2f

exec/Makefile

@@ -32,6 +32,8 @@
 
 # Include configuration
 #
+srcdir:=$(CURDIR)/../
+
 include $(srcdir)Makefile.inc
 
 override CFLAGS += -I$(srcdir)include